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[Bug bootstrap/41241] [4.5 regression] bootstrap comparison failure
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 4 Sep 2009 14:08:54 -0000
- Subject: [Bug bootstrap/41241] [4.5 regression] bootstrap comparison failure
- References: <bug-41241-226@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #35 from ubizjak at gmail dot com 2009-09-04 14:08 -------
(In reply to comment #30)
> Regarding Alpha, there seem to be code generation differences, at least in
> tree-vect-slp.o. Can you check e.g. if there are the code generation
> differences even when you compile it with stage1 in both cases, just once with
> -g and once with -g0? If so, can you attach preprocessed source for it?
No, there were no code differences between objdumps of -g/g0 and (-O2 -g)/(-O2
-g0) when compiled with stage1-gcc/cc1. I think the problem is in register
allocator, as suggested in comment #12.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41241